Lock for sliding panel



Oct. 14, 1958 c. c. HILLGREN LOCK FOR SLIDING PANEL 2 Sheets-Sheet 1 Filed June 18, 1956 r/Maw United States Patent LocK non SLIDING PANEL Carl C. Hillgren, Newport Beach, Calif.

Application June 18, 1956, Serial No. 591,897 6 Claims. Ciro-r00 The invention relates to lock hardware and has particular reference to a door lock capable of use especially on a sliding door where the lock in a sense acts to block the door from sliding back into the slot which normally contains it when the door is open.

While considerable attention has been given to the design and fabrication of sliding door latches, not all of the currently designed latches are so constructed that they can incorporate a locking mechanism. In those devices especially designed to provide a key locking combination difficulty has been experienced in designing an action readily operable from both sides of the door and at the same time of such small size as to permit installation in the usual sliding door without there resulting a bulky and cumbersomestructure and appearance. One

of the limitations present in installations of the kind here referred to is that the sliding door must be capable of entering completely into the slot provided for it so that virtually no portion of it remains exposed except the edge. If the slot is to be kept to'the desired narrow breadth, it is requisite that the lock or latch be of such size that when installed in the door it is substantially flush with the surfaces on both faces of the door. Inasmuch as sliding doors areoften an inch or even less in thickness, the amount of space available for the locking opened by having a portion ofthelock engage the door frame, thereby making it unnecessary to provide any fixture in the side of the frame against which the door opens capable of retaining a hook-like appendage such as is usually used for locks of this kind.

Another object of the invention is to provide anew and improved sliding door lock which is inexpensive, rugged, and easy to install.

A further object of the invention is to provide a new and improved lock especially well adapted to installation in sliding doors of rather small thickness, wherein the lock parts are so constructed that upon installation they can be easily adjusted to doors ofdifferent thickness without impairing readiness of operation.- I

A still further object of the invention to provide a new and improved lock for sliding doors which has a simplemechanism employing relatively few parts and so combined that the bar of the lock can be easily tilted, by hand to lock and unlock from the inside while at the to provide a new and improved lock for sliding doors which avoids the necessity of providing any endwise aperture for such portions of a lock as a latch bolt, thereby substantially minimizing the amount of opening which need provided in the door to receive the locked parts.

With these and other objects in view, the invention consists in the construction, arrangement and combination of the various parts of the device whereby the objects contemplated are attained, as hereinafter set forth, pointed out in the appended claims and illustrated in the accompanying drawings.

In the drawings: a 1

Figure 1 is a horizontal sectional view of a sliding door construction showing the lock located and adjusted to a locked position.

Figure 2 is a fragmentary elevational view taken on the line 2-2 of Figure 1.-

Figure 3 is .a fragmentary elevational view taken on the line 33 of Figure 1.

Figure 4 is a horizontal sectional view of the interior of the lock taken on the line '44 of Figure 2.

Figure 5 is a vertical sectional view of the on the line 5-5 of Figure 2.

Figure 6 is a horizontal sectional view similar to Figure 4 but showing the lock in unlocked position.

Figure 7 is a vertical sectional view taken on the line 77 of Figure 6.

Figure 8 is a fragmentary transverse view taken on the line 8-8 of Figure 6.

Figure 9 is a view similar to Figure 5 but with the keying reversed.

Figure 10 is a view similar to Figure 4 but showing the lockinstalled in a doorof greater thickness.

In the embodiment chosen for the purpose of illustration there is shown a sliding door 10 having an outside face 11 and an inside face 12. On one edge of the door are parts 13 and 14 of a door frame housing between them a slot 15 for reception of the door. A frame 16 on the opposite side is one against which an edge 17 is adapted to abut when the door closes the doorway.

The door is provided with a circular aperture 19 extending therethrough and at the inside end of the aperture is a recess 20.

The lock device comprises an annular or cylindrical casing 21 which has at its outer end a flange 22. Within the annular casing is a cylindrical walled space 23. It will be noted that the length of the casing is substantially less than the thickness of the door 10 from face to face: A housing indicated generally by the reference character 25 lies ,on the side of the door opposite from the side from which the casing 21 enters. The housing in the example chosen has a hollow cylindrical extension 26 which is adapted to slidably enter the space 23. Within the cylindrical casing 21 is a cylinder lock 27 having plugs and pin tumblers of a conventional type currently in use. A face plate 28 overlies the outer end of the cylindrical casing 21 and centers a keyway 29.

An enlargement 30 also forms part of the housing 25 and a flange 31 extends around the perimeter of the enlargement in a position adapted to overlie the inside face 12 of the door.

Inmounting the lock assembly the casing 21 is inserted into the aperture 19 from the outside and the housing is applied from the inside. The flange 22 then overlies the outside face 11 of the door and the flange 31 overlies the inside face 12. The parts, namely, the casing and housing, are anchored together by means of screws 32. Since the cylinder 26 slides freely into the space 23 and since there is a clearance 33 between the inner end of the casing 21 and the inner face of the enlargement 30, should the thickness of the door be smaller, the parts could be lock taken drawn more closely together. Coutran'ly, as illustrated in Figure 10, when the thickness of the door is greater, the parts are permitted to separate to the extent permitted by the length of the bolts 32 and the assembly will thus be made .to fit such door of greater thickness. Wood Screws 34 may be employc'd'to main ain the lo k assemblyin the selected position. I

The locking of the door is accomplished. by 1 .56 of a bolt 40. The bolt lies in a slot 41 in the housing in a horizontal position. A pin 42 tiltably mounts the bolt in the slot at a tilting axis whims is vcttical and which is centered with respect to the axis of the key plug of the cylinder lock 27. Tiltahly mounted. as shown and described y means of the P n'tZthe bolt can tilt from a flush position, as illustrated in Figure to the tilted position, illustrated in Figures l,"4 and'lO. The: bolt moreover is releasably retained in either position hy use of a spring pressed idetent comprising a pin 43 mounted in a hole 44 and normally urged outwardly by action of a spring 45. A recess 46 receives the pin when thie bar is in unlocked position, as illustrated in Figure -6, and a similar recess 47 receives the pin when the bar is in the locked position illustrated in Figure 4, for ekample, to hold it i that position.

When the lock is operated from the inside, it can be locked by first moving the door to close the doorway, as illustrated in Figure 1, and then depressing the righthand end of the bar 40 with the fingers. That will tilt the bar to the position illustrated in Figures 1 and 4, for example, in which position it will be held by action of the spring pressed pin 43. door cannot be slid open from right to left because the left end of the bar 40 will strike against a strike plate 48 on the face of the part 14 of the door frame. To unlock the door it is necessary only to press against the left end of the bar 40 with, the fingers, tilting it back to flush position, as shown in Figure 6.

When the lock is to be manipulated from the outside, a key 68 is inserted into the key plug so as to rotate a cam 49. On the inside face of the bar 40 is a camway 50 on one side and a second camway 51 on the opposite side. A depression 52 separates the camway at both ends. If, for example, it be assumed that the key has been rotated to rotate the key plug of the cylinder lock 27 and cam 49; against the camway 50, the bar 40 will be tilted outwardly to locked position, as illustrated in Figure 4. The key, the key plug of the cylinder lock 27, and cam 49 can then be, returned. to a position wherein the cam 4-9. lies in the depression 52 but the bar will remain tilted outwardly at the. left end to locked position, retained in that position by the spring pressed pin 43.

Obviously the bar can be tilted to unlatched position manually by a person on the inside. Where, however, it must be unlocked by use of a key from the outside, the key of the, cylinder lock 27 and cam 49 are rotated so that the cam rides upon the camway 51 of the bar 40. This will tilt the bar in a clockwise direction, as viewed in Figure 4, for example, at which point the bar will 'be returned to a flushv position, as illustrated in Figure 6. This is the unlocked position where the spring pressed detent embodied in the pin 43 will hold it. The key plug and cam 49 are then returned againto' a position wherein the cam 59 falls in the. depression 52 and they key removed. The bar will continue to remain held in un-- cylinder lock 27 to be withdrawn and; reversed from, the,

position illustrated in Figure, 5 to the position illustrated Moreover, in that position the in Figure 9. The set screw may then be reset and the lock "has been successfully reassembled with the key in reverse position. i

It will be noted that the number of parts in the device are relatively few. The cam 49 is held in place by a bolt 59 fastened to the plug of a conventional cylinder lock. The cylinder lock is readily removable by loosening the set screw 58 as already described. The housing is readily separatable from the casing 21 by removing two screws or bolts 32. Moreover, the bar can be removed by merely dropping the pin 42 from its position. Reassembly is as readily accomplished, namely, by reinsertion of the pin 42 and by replacing the few parts in their original positions, in which positions they are anchored by joint operation of bolt 59 and the set screw after which the parts of the device can be mounted on the door by use of the bolts or screws 32. If desired, a completely flush installation can. be accomplished by cutting. recesses, not shown, into the respective faces 11 and 12 of the door deep enough to receive the flanges 2.2 and 3.1.

While I have herein shown and. described my invention in what I have conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of my invention, which is not to be limited to the details disclosed. herein. but is to be accorded the full scope of the claims so as to embrace any and all equivalent devices.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A lock for a sliding door having opposite faces and adapted to enter a slot in a door frame, said lock comprising a casing and a flange at an outside end thereof,

' a casing element in the casing, and a cylinder lock having a key actuated rotatable plug rotatably secured in the casing element, a separate housing, and removable means securing said housing to said casing at a location on the side opposite said flange, said housing having, a horizontal slot therein lying in a position diametrical with respect to the rotatable plug, a locking bar having a barring end and securing means tiltably securing said bar to the housing in the slot, said bar having an unlocked position flush with the housing and a locking position with the barring end tilted outwardly of the housing, a camway on a portion of the bar facing said rotatable plug and a cam on an end of the plug facing said bar rotatable to positions. on the camway at locations on opposite sides of said securing means whereby to tilt said bar to locked and unlocked positions.

2. A lock. for a, sliding door having opposite faces and adapted to enter a slot in a door frame comprising a casing and a flange at an outside end thereof, a cylinder in the casing, and. a cylinder lock having a key actuated rotatable plug rotatably secured in the cylinder, a separate. housing, and removable means securing said housing to said casing, said housing having a horizontal slot therein, a locking bar and means. tiltably securing said bar to the. housing in the slot, said bar having an unlocked position flush with the housing and a locking position with a barring end tilted outwardly of the housing, a detent between the bar and the housing operable in both positions of the bar, a camway on the bar extending to both horizontal sides of the pin and a cam. on the plug rotatable to positions alternatively against the camway on opposite sides of the pin whereby to tilt said bar to locked and unlocked positions and having a neutral position therebetween. V

3... A lock for asliding door having opposite faces and adapted to enter a slot. in a door frame comprising an annular casing and a flange at. an outside end thereof, a cylinder in the casing, and a cylinder lock having a key actuated rotatable plug. rotatably secured in the cylinder, a separate housing, and. removable means securing said housing to said, casing, said housing having. a horizontal slot therein, a locking bar and a pin. tiltably securing said bar to the housing in the slot, said bar having an unlocked position flush with the housing and a locking position with a barring end facing an adjacent edge of the door tilted outwardly of the housing and with a control end tilted inwardly of the housing, a detent between the bar and the housing operable in both positions of the bar, a camway on the inside of the bar on both horizontal sides of the pin and a cam on the plug rotatable to positions alternatively against the camways on opposite sides of the pin whereby to tilt said bar to locked and unlocked positions, said cam having a neutral position therebetween.

4. A lock for a sliding door having opposite faces and adapted to enter a slot in a door frame comprising an annular casing and a flange at an outside end thereof, a cylinder in the casing, and a cylinder lock having akey actuated rotatable plug rotatably secured in the cylinder, a separate housing, and removable means securing said housing to said casing, said housing having a horizontal slot therein, a locking bar and means tiltably securing said bar to the housing in the slot, said bar having an unlocked position flush with the housing and a locking position with a barring end tilted outwardly of the housing, a detent between the bar and the housing operable in both positions of the bar, a pair of camways of equal length and pitch extending horizontally inwardly on the inside of the bar and located one on each horizontal side of the pin and a depression between both adjacent ends of the camways, a cam on the plug rotatable to positions alternatively against the camways on opposite sides of the pin whereby to tilt said bar to locked and unlocked positions and having a neutral position therebetween, said cylinder lock having a laterally extending web, and said cylinder having two recesses spaced from each other adapted alternately to receive said web whereby to mount the plug in opposite operable positions.

5. A lock for use with a sliding door having opposite faces and an aperture therebetween, said lock comprising a casing having a hollow cylindrical interior adapted to extend into the aperture from one face and having a means extending radially outwardly at one end whereby to overlie one face of the door, a separate housing having a portion thereof adapted to extend into the aperture from the other face, said housing having a means thereon adapted to overlie said other face of the door, and fasteners extending between said housing and said casing adapted to anchor said casing and said housing together in said aperture on the door, a hollow cylinder on said housing extending slidably into the interior of said casing to a position therein depending on the thickness of the door, a cylinder lock having a key plug therein and a bolt tiltably mounted in the housing on a vertical axis at a location substantially flush with the means thereon and subjected to tilting between locked and unlocked positions in response to movement of the key plug into engagement with the bolt on one side of said vertical axis.

6. A lock for use with a sliding door having opposite faces and an aperture therebetween, said lock comprising a hollow cylindrical casing adapted to extend into the aperture from one face and having an annular flange extending radially outwardly at one end whereby to overlie one face of the door, a separate housing having a portion thereof adapted to extend into the aperture from the other face, said housing having a flange thereon adapted to overlie said other face of the door, and threaded posts extending between said housing and said casing adapted to anchor said casing and said housing together in said aperture on the door, a hollow cylinder on said housing extending slidably into said casing to a position within the door depending on the thickness of the door, a cylindrical lock having a key plug therein and a bolt tiltably mounted on a vertical axis in the housing at a location substantially flush with the flange thereon and subjected to tilting between locked and unlocked posi-' tions in response to operative rotation of the key plug and movement of a portion of said key plug into engagement with the bolt on one side of said vertical axis, said movement being in a direction transverse with respect to the sliding door.

References Cited in the file of this patent UNITED STATES PATENTS 149,729 Dotterer Apr. 14, 187.4 300,325 Norton June 10, 1884 1,646,181 Babekuhl Oct. 18, 1927 1,998,689 Ross Apr. 23, 1935 2,448,748 Vanderveld Sept. 7, 1948 2,717,512 Sterling et a1. Sept. 13, 1955 FOREIGN PATENTS 32,061 Sweden Dec. 30, 1911 

